Home / 5,128.57-7,073.40-3,712.47

Finding the Fourth Proportional to 5,128.57, 7,073.40 and 3,712.47

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Solution

The fourth proportional to 5,128.57, 7,073.40 and 3,712.47 is: 5,120.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.57 : 7,073.40 = 3,712.47 : x
  2. Step 2: Convert to fraction form
    5,128.57/7,073.40 = 3,712.47/x
  3. Step 3: Cross multiply
    5,128.57x = 7,073.40 × 3,712.47
  4. Step 4: Simplify right side
    5,128.57x = 26,259,749.93
  5. Step 5: Solve for x
    x = 26,259,749.93/5,128.57
  6. Step 6: Final answer
    x = 5,120.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.